557689 has 8 divisors (see below), whose sum is σ = 614880. Its totient is φ = 505780.

The previous prime is 557671. The next prime is 557693. The reversal of 557689 is 986755.

It is a happy number.

It is not a de Polignac number, because 557689 - 2¹⁵ = 524921 is a prime.

It is a super-2 number, since 2×557689² = 622034041442, which contains 22 as substring.

It is a Duffinian number.

557689 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (557639) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1122 + ... + 1540.

It is an arithmetic number, because the mean of its divisors is an integer number (76860).

2⁵⁵⁷⁶⁸⁹ is an apocalyptic number.

It is an amenable number.

557689 is a deficient number, since it is larger than the sum of its proper divisors (57191).

557689 is an equidigital number, since it uses as much as digits as its factorization.

557689 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 452 (or 430 counting only the distinct ones).

The product of its digits is 75600, while the sum is 40.

The square root of 557689 is about 746.7857791897. The cubic root of 557689 is about 82.3121652579.

It can be divided in two parts, 5576 and 89, that added together give a palindrome (5665).

The spelling of 557689 in words is "five hundred fifty-seven thousand, six hundred eighty-nine".